In this page combination of solids solution13 we are going to see solution some practice questions of the worksheet combination of solid worksheet2.

**Question 13:**

An iron right circular cone of diameter 8 cm and height 12 cm is melted and recast into spherical lead shots each of radius 4 mm. How many lead shots can be made?

**Solution:**

diameter of right circular cone = 8 cm

radius of right circular cone (r) = 4 cm

Height of right circular cone (h) = 12 cm

Radius of spherical lead shot (r) = 4 mm

10 mm = 1 cm

4 mm = (4/10) cm

Volume of right circular cone = n x (Number of spherical lead shots)

n = Volume of cone/Number of spherical lead shots

n = (1/3)Π r² h/(4/3)Π r³

n = (1/3) (4)² (12) **x** (3/4) (10/4)³

n = (1/3)** x** 4** **** x** 4

n = 3** x **5 **x **5** x **10

n = 750 lead shots

**Therefore 750 lead shots can be made.**

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